Improvement in fuddjc



in circulating through the boxes A further ,advantage of 'my invention is the facility with which any one or more of the boxes can be removed, when damaged, and be replaced with a new one, the hollow iire-box X being also detachable.

The boxes being independent of each other in every respect, excepting the above-mentioned pipes, all that is necessary is to disconnect the` same when u. box hasv to he 'removed or replaced.

As another advantage of the" l furnace, arising from the. constant circulation of water around the walls. of

the same, may be mentioned thereduction in thiek-v ness ofthe usual fire-brick lining, amounting, in many cases, to nearly one-half, and effecting a considerable saving in the first cost of the furnace.

Although I have referred to my invention as applied to a pnddling furnace, it will be evident that it may be adapted to heating and other furnaces with the .best results.

I do not claim, broadly, a pla-te supporting the hed to allow a current of' .air to pass beneath the same. n

O lainis.

' .L A series ot' hollow boxes, B, tted together' andarranged as described, incombination with communicating tubes or channels, so arranged that water introduced into one box will flow through the others successively, as specified.

2. The hollow detachable fire-box X, constructed and adapted to the fire-place, as set forth.

3.- The metal bridge E, arched as described, and arranged to support the bed of the furnace.

4. The detachable strips ln, adapted to the door x, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOS. E. PURCHASE.

Witnesses:

It. It. TAYLOR, e GEORGE PRLv'rz; 

